Slide-rule.



W. L. E. KBUFFEL.

SLIDE RULE;

Prmonlox Hmm mxo. ao, 1901.

Patented Dec. 22, 1908.

Inventor: by @MW y?. @M

M Atti,

UNITED PATENT FFICE.

WILLIE I.. E. KEUEFEI., oF HoBoKEN, NEw JERSEY, SSIGNOR 'ro/'HIE KEUFEEL a ESsER COMPANY, or EoRoKEN,-NEW JERSEY, A CORPORATION oF -NEw JERSEY.

' SLIDE-RULE;

Specification of Letters Patent;

riaten'tea Dec. 22, 190e.

boken, in the county of Hudson and-State of.

New Jersey, have invented certain-new. and

useful Improvements in Slide-Rules, of whichthe following is a s eciication. w

My invention re ates -to slide rules and its novelty consists in the means employed to secure a proper adjustment or arrangement of the parts after changes due to variations in temperature and in the amount of moisture inthe air and similar causes. f

My invention relates particularly to that class of slide rules in which the slide is adapted to reciprocate between two rules.. "These rules are sometimes as much as twenty inches" in length. They lare usually made vof wood with a surface of paper or celluloid on which the graduations. are displayed and are therefore articularly liable to grow or swell, vif the weat er is damp and hot, and to correspondf in ly shrink if the weather is dry and cold. t is the purpose of my invention to provide means whereby a proper adjustment of the parts lcan be made after such distortion. In the drawings, Figure 1 is a plan of a slide rule embodying my invention, the middle ortion being shown broken away. so as to illustrate it wlthin the limits of the sheet'. Fig. 2 is a transverse section of the plane of the line 2-2 in 1. Figs. 3 and 4 are deL l tails of the extremities of one of the rules.

In the drawings, 10 and 11 are rules made of wood, or similar material, each with a surface 12 logarithmically graduated according to the rInci les governing their method of use an whic are well known to those skilled in the art. dinally recessed on their inner edges aja-,1 3 and 14 respectively, so as to engage with' the lianges 1,5 of the slide 16, and they are'held' apart by two transverse members 17 and 18, preferably made of brass, or similar material, and firmly secured to one of the rules b riv ets 19, shown in dotted outline in bot ures. They are adjustably Vsecured to the other slide inthe manner whichI am about to describe.

The Slide 16 has a surface 2o of paper or celluloid, which is also suitably and Inically graduated to be used in harmony with the rules. Its longitudinal anges 15 are adapted to engage with the recesses -13 and -14 In the rules.

ogarithprovidedI They are longitutions and those of the slide coincide.

its graduations coincides with some one 4grad uation on one yof the rules.V It is then movedagain so that some other graduations-similarly coincide-and the-value of the-ruledep'ends upon the accuracy of coincidence ofthese second grad-nations; Now, in a device of this kind, the parts may shrink causing them to work too loosely, or swell, causing them towork too tightly. Itis the urpose of my invention to provide for a rea of the parts after either condition has become establlshed. To that end I for rearranging the parts. he transverse members 17 and 18 being rigidly secured to Itwill be'understood that in-'usingthe defvice the slide'isvmoved sothat some one of j ustment,

iovide means likely to be needed. The adjustment which is necessary is between the slide 16 and the rule 10. This rule 10 is provided at one end and at a place where it is in contact with the transverse members 17 and 18, with a slot 21 having a width equal to that'of a screw or bolt 22 ada ted to pass through it and to exage with both transverse members and a ength greater than its width, its length being in a direction at right angles to the longitudinal axis of the device. This rule is rovided at its other end, and at a4 place w ere it is in contact with the other airof transverse members 17 and 18 -wIth a .slot 23 which is slightly larger in all directions than the diameter of the screwor bolt 24 adapted to pass through it and which-engages such transverse members.

The-mode of using the invention is as followsz" Su pose that the parts have shrunk 0I' swelle the screws 22 and 24 are sli htly loosened sufficiently to permitthe sli e 16 to A-move freely between the rules.k 10 and 11 Without binding'. The slide 16 is thei stopped at a osition where its major graduations coinci e with those of the rule 11, as they ought to do.

then loosened more freel than before and The screws 22 and 24 are the rule 10 is moved unti its major graduascrews are then tightened, rst, the one inv the slot 21, and second, the one in the slot 23; It mi ht be thought that bothslots 21 and 23 shouId be transverse slots of the same diameter as the screws as'sing through/them. This could be `so in sliort rules, but in long rules where there will be al tendency of rule 10 to warp more than rule .11, inasmuch as The Y w' beirstti htl the later is gial .braced by melibe'rs 17 j and 18, it is advisa le to t'provlde a clearance space around .one of the o y olts lon itudinall the rule as Well as transverse y thereo 5` Thus, in practice, should the rule 410 war its end provided with slot 21, and movab e onl in a transverse direction upon screw 22, secured in ro er relation to slide 16`an ru e 11, after W 'c the opposite end, provided with sloti23 may be forced to corresponding relation, and t' htly secured by Vscrew 24. rom this it wi be seen that the movement of the iirst named end of rule 10, is a strictly transverse one as the rule is loose but when this end' is., secured, the

prising a pair of rules,a slide'mounted to reciprocate between the same, holding elements transversely of the device, and means for securing the rules and holding elements together, adapted to permit relative adjustment between the rules and slide in a direction a proximately transverse to and elther,

towar vdevice. Y

2. A device ,of the kind described, comor from the longitudinal axis of the prising a frame, a pair of rules, a slide mounted td reciprocate between the rules, means iorsecuring one of the rules immovably to 'the frame, and means for permitting the other rule tobe adjusted in the frame toward and from the slide to compensate for swelling*y and shrinkage and for securing it in adjuste position. y

3. A slide rule, comprising a pair of rules, a slide mounted to reciprocate between the 40 same holding means engaging the rules and slide and provided opposite one of the rules with apertures in its top and bottom walls and said rule` having an aperture registering withthose in the holdin i means, and securin site the other rules, said other rule having apertures which register with those in the` holding means, and securing devices extending through the registered apertures in said ru e to reci rocate between two rules held in position b a frame, one otsaid rules being provided with means whereby it ma j usted in the frame and secured in p ace after adjustment, consisting of a slot in the rule and a screw or bolt adapted to pass vtherethroughand engage the frame, the slot being wider than the screw or bolt in a direction at right angles to the longitudinal axis of the slide rule. u

7. A'slide rule, comprising a slide adapted to reciprocate between two rules held in osition y `a frame secured to both rules ut not to the slide,` one of said rules being provided with means whereby it maybe adjusted in the frame and secured in lace after'adjustment, consisting ofa slot 1n the rule and a screw or bolt adapted to pass therethrough and engage the frame, the slot being wider than the screw or bolt in a-direction at right 'an les to the -longitudinalaxis oi the s'hde 8. A slide rule, comprising two rules held apart b; transverse members to which they are bot members, and means whereby one of the rules may be adjusted. with respect to such transverse members, consisting of a slot in the rule, and a screw or bolt adapted to pass therethrou h and engage the V`adj acent transverse mem ers. i

9. A slide rule, comprising two rules held secured and adapted to permit a slide to-reciprocate between them and such be adlapart b a" transverse members to which they are bot secured and adapted to permit a slide to reciprocate betweenthem and s uch members, and means whereby .oneof the rules may `be adjusted with respect to such transverse members, consisting of a slot in 45 means extending throu h said apertures an of less diameter than the aperture i the rule in a direction transverse to the longitudinal axis of the latter.

4. A slide rule, comprising a pair ofy rules a 5o slidegmounted to reciprocate between the 11b i same, holdi same, holding means en aging the rules and slide and ixedly secure to one of the rules and provided opposite the otherrule with apertures in 'its top and bottom'walls, -said y55 other rule having a through-opening which registers with said apertures, and securing means comprising a stem which is received by the apertures in the holding means and rule and is of less diameter than the latter in'the 60 direction of the longitudinal axis of said rule.

5. A slide rule, comprising a pair of rules, a slide mounted to reciprocate between the l means arranged. at opposite ends of the ru es and fixedly secured -to one of 65 the rules and provided with apertures oppothe rule, and a screw or bolt adapted to pass therethrou h and-en age the adjacent transverse mem ers, the s ot being longitudinally as wide as the screw or bolt and transversely wider.

10. A slide rule comprising a slide adapted to reciprocate between two rules, one of said rules being rovided with means at or near each end w ereby it may be adjusted with res ect to the slide to compensate for longitu inal and transverse variation in the area of the rule and held in position after such adjustment.

1 1. A slide rule, comprising a slide adapted to reciprocate .between two rules held in position by a frame, one of said rules being provided with means whereby it may be adj usted transversely and longitudinally in the frame and secured at or near .each of its ends in place after ad'ustment. v

12. A slide rule, comprising a slide' adapted to reci (recate betweentwo rules held in position a frame secured to both rules but not to the slide, one of said rules being provided with means whereby it may be adjusted transversely and longitudinally in the frame and secured at or near each of its ends in place after adjustment.

l13. A slide rule, comprising two'r'ules, a

reciprocatory slide, and transverse members to which the rulesare secured, the securing means for one of said rules ada ted to permit the rule to be adjusted relative yto the transverse members longitudinally of the device and laterally outward and inward from its initial position and to secure it x'edly in its adjusted osition.

14. A s 'de rule, comprising a slide adapted to reciprocate between two rules held-in position by'a frame, one of said rules being provided with means whereby -it may be adj usted transversely and longitudinallyin the frame and secured in place after adjustment, y

consisting of two slots in the rule adapted to cooperate with proper screws or bolts, one slot being longitudinally as wideas its screw or bolt and transversely wider, and thero'ther i slot being larger than its screw vor bolt all. directions. a

' 15. A slide rule, comprising a slide adapted to reciprocate between two rules held in position y a frame secured to both rules but not to the slide, one of said rules being provided with means whereby it may be adjusted transversely and longitudinally in the frame and secured in place after adjustment, consisting of two slots in the rule each adapted to co erate with proper screws or bolts, one slot eing longitudinally as wide as its screw or bolt and transversely wider and the other slot being 'larger than its screw orbolt in all directions.

,16. A slide rule, comprising two rules held apart b transverse members towhich they are botii secured and adaptd'to permit a slide to reciprocate between them and such members7 and means Iwhereby one of the rulesmay beI adjusted transversely` and l'ongitudinally with respect to such transverse' members, consisting of two slots in the rule, each adapted to coperate with proper screws or bolts, one slot-being longitudinally as wide l as its screw or bolt and transversely wider and the other-slot being'larger than its screw or bolt in all directions.

In testimony in presence of two witnesses.

' AWILLIE L. E. KEUFEEL.

4 60- whereof I aHix my signature 

